COHERENCE IN SPONTANEOUS RADIATION PROCESSES
COHERENCE IN SPONTANEOUS RADIATION PROCESSES
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DOI：
10.1103/physrev.93.99
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发表时间：
1954-01-01
期刊：
影响因子：
--
通讯作者：
DICKE, RH
中科院分区：
文献类型：
--
作者：
DICKE, RH
通过考虑辐射气体作为一个单一的量子力学系统，对应于个别分子之间的某些相关性的能级进行描述。在两个这样的能级之间的跃迁中的辐射的自发发射导致相干辐射的发射。讨论首先限于尺寸小于波长的气体。计算了自发辐射率和自然线宽。计算了大范围气体中光子反冲动量对相干性的影响。讨论了辐射脉冲在激发“超辐射”态中的作用。本文计算了初始处于热平衡的气体自发发射的连续光子之间的角关联。
By considering a radiating gas as a single quantum-mechanical system, energy levels corresponding to certain correlations between individual molecules are described. Spontaneous emission of radiation in a transition between two such levels leads to the emission of coherent radiation. The discussion is limited first to a gas of dimension small compared with a wavelength. Spontaneous radiation rates and natural line breadths are calculated. For a gas of large extent the effect of photon recoil momentum on coherence is calculated. The effect of a radiation pulse in exciting" super-radiant" states is discussed. The angular correlation between successive photons spontaneously emitted by a gas initially in thermal equilibrium is calculated.